Thursday (March 14) marks Jessica Mulroney's birthday! Duchess Meghan's best friend has been there for her during some of her most important recent milestones. She was a pillar of support during the the mom-to-be's royal wedding to Prince Harry, as well as during the royal's first ever official tour.

But who is the Meghan's BFF? Here's everything we know about Jessica...

Fashion runs in the family! A stylist herself, Jessica is also the descendant of the founder of a shoe empire. Duchess Meghan's BFF is related to Benjamin Brownstein, who created Browns Shoes Inc. after immigrating to Montreal from Romania.

Jessica is married to Ben Mulroney, a TV host who's also the son of former Canadian Prime Minister Brian Mulroney. Ben hosts CTV’s etalk, where he’s covered everything from the Oscars to the JUNO Awards. He’s also known for hosting Canadian Idol and has been a contributor on ABC News’ Good Morning America since 2012.

In her fashion work, Jessica has styled many big names – including Canadian First Lady Sophie Grégoire-Trudeau. Jessica worked on Sophie’s outfit for husband JustinTrudeau's 2015 swearing-in ceremony after he was elected prime minister, according to Huffpost Canada.

The fashionista worked with Hudson’s Bay to outfit Sophie in a white baby alpaca coat by Sentaler and a black and navy dress from Erdem.

Jessica’s friendship with Meghan dates back to her pre-royal days in Toronto, where Prince Harry’s wife lived while starring in Suits. The two reportedly became friends through their love of yoga, according to Harper’s Bazaar. They’ve since taken many vacations together.

Jessica and Ben reportedly hosted dinners for Meghan and Harry when the couple were first dating, ensuring the lovebirds had a place to meet away from prying eyes. According to E! News, Harry won the Mulroney children over by bringing bags of toys for them. So cute!

The Mulroney children are also regularly featured on Jessica’s Instagram, where she shows off both the incredible and everyday things she and her family do on a regular basis. Here they are sleepy with dad Ben! Aww!